[Jonathan Norris]

I also am a bit concerned about how small your wheel base is also, on of the greatest advantages of a tank system is having a HUGE wheelbase. I can see that the reason you made it so small is to be able to climb something.. but you wont need that great of an angle to climb anything. Otherwise it is a beautiful system which I would love to see in person if completed, but I also recommend using timing belts... The transfer of power will be much more efficient and you will not have to worry about slipping (thou I doubt that would happen).